It's always great when these luxury condos and penthouses don't sell right away, and the agents create these inside peek videos to show off the spaces you may otherwise never get to see.

Check out this video tour of this 4,156 square foot penthouse apartment in NoHo off of Astor Place, all your for just $15 million.

The trophy full-floor penthouse in Gwathmey Siegel’s “Sculpture for Living” is a carpe diem opportunity to own the extraordinary. This one-of-a-kind penthouse is located in the most notable piece of architecture of its time; defining its NoHo neighborhood and setting the stage for others to follow.